They sailed from Plymouth, on the southern coast of England.
When Alexius I Komnenoi implored the pope (Urban II) for help, he meant it to reconquer the lost Byzantine lands (and therefore return in to their de facto ruler, a.k.a., the Byzantines). Urban however, decided to merely use that as a façade in order to then invade the Muslims, and retake the holy land.
He also saw the wanted to unite Christianity as a whole (All the sects at the time, Orthodoxy, Catholicism, Paulicianism, Iconoclasts, etc. into a single conglomerate, fighting a common enemy.)
<span>The U.S. government supported nativist attitudes during the 1920's due to the rising levels of nationalist sentiment that was growing within the American population. The outcome of WWI and other related events had shifted popular opinion well in that direction. As a means of supporting these positions, the government issued the Emergency Immigration Act of 1921 and National Origins Act of 1924, pieces of legislation which imposed quotas on the allowable levels of immigration from certain European nations.</span>